Improvement in hemmers for sewing-machines



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Hemmers for Sewing-Machines.

Y PatentedSeptember23,1873.

UNITED STATES PATENT EETGE.

JOHN F. JOHNSON, OF CINCINNATI, OHIO.

IMPROVEMENT IN HEMMERS FOR SEWING-MACHINES.

Specification forming part of Letters'Patent No. 143,160, datedSeptember 23, 1873 application filed August 23, 1873.

To all whom it may concern:

Be it known that I, J oEN F. JOHNSON, of Cincinnati, Hamilton county,Ohio, have invented a new and useful Hemming Attachment forSewing-Machines, of which the following is a specification:

This is an improved form of those hemmers that are adapted to beattached to the clothplate of a sewing-machine; and comprises devicesfor' forward or backward and right or left adjustment to suit themachine and the kind of work to be performed, and a provision ofhemming-scroll, adjustable both for width and distance, and ofsimultaneously-adjustable gagie and presser plate to correspond therewltFigure lis a perspective view, representing a hemmer embodying myimprovements in p0- sition upon a sewing-machine. Fig. 2 is averticalsection of the same at right angles with the feed, the parts being setfor a narrow hem. Fig. 3 is a similar section oi' the operative parts toa larger scale, said parts being set for a wider hem. Fig. 4. representsthe parts of my hemmer detached. Fig. 5 is an under-side view of myscroll and spreader blade.

A, B, C, and D represent, respectively, the cloth-plate, presser-foot,needle bar, and needle of a sewing-machine.

My hemmer is composed of four plates, E, F, G, and H, a customarythumb-screw, I, and two nuts, `J J My attachment plate or bracket E isof the represented L form, Aone limb having a slot, e, and the otherlimb having projecting vertically from it two screws, K K',which enterthe nuts J J', whose office is to fasten the several members of theheinmer to their adjusted positions. The slot e is traversed by thecustomary thumb-screw I, by which the hemmer is attached to theclothplate, the said slot e enabling the hemmer to be set forward orbackward, to suit the machine and the work to be performed; slots f, g,and h in the plates F, G, and H serving the same purpose in thecomplementary direction, or to right and left. Resting upon the bracketE is my gage-plate F, slotted at f to embrace the screw'K, and atf' toreceive a tongue, P, from spreader-plate H, thus compelling both theseplates to move in conjunction, and to always maintain the same relativeposition and their proper parallelism with the other members, whilepermitting of their concurrent adjustment to right 0r left. Theoperative or left end of gage-plate has a down-turned lip, L. Restingupon the said gage-plate is my scroll-plate Gr, whose lett or outer endterminates in the' customary flattened tapering scroll or volute M, andwhose rear or right eX- tremity takes the form of an upturned lip, N.The plate Gr is slotted at g for the screw K and tongue P, which operateto hold the said plate in line while being adjusted to the right orleft. The whole is surmounted by spreaderplate H, Whose slot tpermitsthe traverse of screw K, and whose tongue P traverses the slot g ofscroll-plate G, and occupies the slot j" of gage-plate F, ashereinbei'ore stated. The tongue P may be permanently secured by screwor rivet to the plate F, if desired. The outer or left end of plate Hhas a turned-under reiiexed lip or blade, O, which acts as an elasticspreader for the cloth, and, in connection with the scroll and the gage,already described, serves to support the cloth, and also to hold the hemto its proper width and presentation for the stitching action. The rightextremity of spreader-plate H is upturned, to form a handle, Q.

The members E, F, G, and H being held loosely together by nuts J and J',the hemmer is attached to the cloth-plate loosely by means of the screwI, and, being adjusted to its proper position in the line ot' feed, ispermanently secured thereto by tightening the said screw. Thescroll-plate G is now set at the proper lateral adjustment with respectto the needle, and is secured thereto by nut J', and, finally, thegage-plate, and with it the spreader, are adjusted to give the desiredwidth'of hem, which having been effected, the nut J is tightened, andthe machine is ready for the cloth, which is inserted in the usual way,and the lhemming proceeded with in the manner familiar to operators.

YI claim as new and of my invention- The combination of slotted bracketE with screws K K,slotted gage-plate F L, scroll-plate Gr M, spreader HO P Q, and tightening-nuts J and J', all constructed, arranged, andoperating as described.

In Ytestimonyoi which invention I hereunto set my hand.

' JOHN F. JOHNSON. Attest:

CHARLES H. WILLIAMS, GEO. H. KNIGHT.

